Research on Slagging Prevention in 600-MW Supercritical Boilers with Four-Wall Tangential Firing

doi:10.11930/j.issn.1004-9649.2013.5.1.4

Abstract

Abstract: In order to solve the serious slagging problem in a 600-MW supercritical boiler of a power plant, research was conducted to figure out the slagging locations based on the analysis of features on the structure of the boilers with wall tangential firing. Testing combined with numerical simulation was adopted in the research. By watching the peep holes and blowing the soot blower one by one, slagging was located around the burner nozzles rather than the lower part of the platen superheater where slagging frequently happened. Analysis showed that there is deviation existing in the furnace temperature distribution; low ash fusion temperature of the as-fired coal and high cross-sectional thermal load in the burner zones are the main reasons for furnace slagging. Some countermeasures were taken and the slagging problem in the boiler was solved successfully. Also, this method can be a reference for other types of boilers.

Key words: supercritical boiler, slagging, four-wall tangential burning, numerical simulation

CLC Number:

TK227.2

WU Ying, MAO Xiao-fei, WANG Qian, CHEN Lin-guo. Research on Slagging Prevention in 600-MW Supercritical Boilers with Four-Wall Tangential Firing[J]. Electric Power, 2013, 46(5): 1-5.

Add to citation manager EndNote|Ris|BibTeX

URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2013.5.1.4

https://www.electricpower.com.cn/EN/Y2013/V46/I5/1

References

[1] 艾百仁,王春礼,赵辉.锅炉结焦的原因及应对措施[J]. 电站系统工程,2010,26（4）：64.
AI Bai-ren, WANG Chun-li, ZHAO hui. Reasons of boiler slag and countermeasures[J]. Power System Engineering, 2010, 26(4):64.
[2] 陈孝安. 1 000 MW机组锅炉结焦原因分析及预防措施[J].华电技术,2009,31（11）：26-29.
CHEN Xiao-an. 1 000 MW unit boiler coking cause analysis and preventive measures[J]. Huadian Technology, 2009, 31(11): 26-29.
[3] 周松林,李树君. 哈三电厂2 100 t/h锅炉的结焦原因分析[J].电站系统工程,2001,17（5）：266-268.
ZHOU Song-lin, LI Shu-jun. Slagging analysis of 2 100 t/h boiler in Harbin No.3 Power Station[J]. Power System Engineering, 2001, 17(5): 266-268.
[4] 韩奎华,高寒,翟雷,等. 600 MW “W”火焰锅炉结焦原因分析与防止措施[J]. 锅炉技术,2005,36（5）：47-50.
HAN Kui-hua, GAO Han, ZHAI Lei, et al . Cause analysis and prevention measures on the slagging in 600 MW “W”-flame boiler[J]. Boiler Technology, 2005, 36(5): 47-50.
[5] 张志远. 沧东电厂660 MW超临界锅炉结焦特性分析[J]. 锅炉技术,2011,42（1）：60-63.
ZHANG Zhi-yuan. Cangdong Power Plant 660 MW supercritical boiler slagging analysis[J]. Boiler Technology, 2011, 42(1): 60-63.
[6] 侯昭毅. 基于“MBEL”W火焰锅炉结焦现象原因分析及其对策[J]. 锅炉技术,2010,41（6）：37-41.
HOU Zhao-yi. The analysis and countermeasures based on“MBEL” W flame boiler coking situation[J]. Boiler Technology,2010, 41(6): 37-41.
[7] 赵桂丽. 锅炉结焦的原因分析及预防措施[J]. 电站系统工程,2010,26（3）：71-74.
ZHAO Gui-li. Analysis of boiler slagging reasons and preventive measures[J]. Power System Engineering, 2010, 26(3): 71-74.
[8] 熊蔚立,黄伟,刘志辉,等. 600 MW机组“W”火焰锅炉结焦原因分析及对策[J]. 中国电力,2009,42（12）：57-60.
XIONG Wei-li, HUANG Wei, LIU Zhi-hui, et al . Cause analysis and countermeasures on slagging for a“W”-shaped flame boiler of a 600 MW unit[J]. Electric Power, 2009, 42(12): 57-60.
[9] 黄伟,李文军,雷霖,等. 600 MW亚临界“W”火焰锅炉机组劣质煤燃烧特性[J]. 中国电力,2009,42（7）：51-55.
HUANG Wei, LI Wen-jun, LEI Lin, et al . The practice and analysis of inferior coal combustion characteristic in 600 MW W-flame subcritical boiler[J]. Electric Power, 2009, 42(7): 51-55.
[10] ZELKOWSKI J. 煤的燃烧理论与技术[M]. 袁钧卢,张佩芳,译.上海：华东工学院出版社,1990.
[11] 吴英,林显敏,陈林国. 600 MW四墙切圆燃烧超临界锅炉炉膛出口烟温偏差试验研究[J].电站系统工程,2012,28（6）：32-34.
WU Ying, LIN Xian-min, CHEN Lin-guo. Testing and study on furnace exit flue gas temperature deviation of 600 MW supercritical boiler with four walls tangential burning[J]. Power System Engineering, 2012, 28(6): 32-34.

[1]	Shun ZHANG, Zhenguo WANG, Wendong JIANG, Feng XU, Zhongdong DUAN. Numerical Study of Ultra-High Voltage Transmission Tower Wind Loads Characteristics Against Tornado [J]. Electric Power, 2023, 56(10): 153-163.
[2]	Zhoubin LIU, Tao ZHU, Wei JIANG, Xiaobo ZHANG, Jionggeng WANG, Qianqian GUAN, Qiushi ZHANG, Qingliang ZHAO. Simulation Analysis and Structure Optimization of Cooling System for Energy Storage Lithium-Ion Battery Pack [J]. Electric Power, 2023, 56(10): 202-210.
[3]	PAN Xiaowei, PENG Shuo, LI Shuo, ZHOU Xian, WANG Changjun, LIU Jun, WANG Ruiyuan. Research on the Uniformity of Flow Field in the Low-Temperature Waste Heat Recovery Tower of Waste Heat Boiler Flue Gas [J]. Electric Power, 2022, 55(3): 159-166.
[4]	WEI Jianguo, LIU Weilin, DENG Hui, HUANG Hui, ZHANG Jia. Numerical Simulation and Optimization of Metal Grid Architecture for Laser Photovoltaic Converters [J]. Electric Power, 2021, 54(10): 161-168.
[5]	WANG Yang, ZHU Xiaoxin, CHEN Ming, WANG Huajian, FANG Fan, ZHU Weijian. Experimental Studies on the Influence of Soot Blowing on the Overheating of Water Wall Pipes under Low Loads in Supercritical Boilers [J]. Electric Power, 2020, 53(11): 227-233.
[6]	LEI Siyuan, LI Haihao, LI Letian, NI Guidong, KONG Fanhai, WU Guoxun, BIAN Zijun. Design for Modification of Flue Gas Temperature Adjustment Bypass for SCR Denitrification System under Low Load Operation Conditions [J]. Electric Power, 2019, 52(9): 179-184.
[7]	CHEN Haijie, MA Wu, LIU Gongyi, GAO Pan. Study on SNCR Denitration of W-flame Boiler and Its Effect on the Flow Field of SCR Inlet Section [J]. Electric Power, 2019, 52(7): 146-153.
[8]	YAN Junfu, ZHAO Xuebin. Testing and Numerical Simulation on the Abrasion of SCR Catalysts [J]. Electric Power, 2019, 52(5): 170-175.
[9]	XIAO Yujun, ZOU Yihui, LI Caiting, ZHOU Xuebin. Applicability Analysis on the Structure Model and Numerical Model for the SCR System [J]. Electric Power, 2019, 52(3): 146-152,160.
[10]	LIU Hanxiao, CHEN Zhaomei, GUO Gaofei, WANG Jianbo, CUI Ying, MENG Yincan, LIU Meiling. Experimental Studies and Numerical Simulation on the Injection and Spray of Activated Carbon Powder for Mercury Removal from Flue Gas [J]. Electric Power, 2019, 52(10): 138-143,170.
[11]	SHE Xiaoli, PAN Weiguo, WANG Chengyao, NI Yingchun, QIN Ling. Numerical Simulation of Evaporative Evaporation of Desulfurization Wastewater by the By-pass Tower [J]. Electric Power, 2019, 52(1): 129-136.
[12]	WANG Yang, WANG Huajian, ZHOU Hongguang, YAN Xianglin, BAI Peng, LU Qi. Study on Testing Method and Application of Water Wall Tube Temperature for Ultra-Supercritical Boiler [J]. Electric Power, 2019, 52(1): 166-173.
[13]	ZHOU Lingmei, ZHANG Guanjun, ZHU Xianran, LI Haoyu, JIAO Kaiming. Technical and Economic Investigation of Blended Combustion with Inferior Coal on 600 MW Unit Boiler [J]. Electric Power, 2018, 51(9): 1-7.
[14]	LIU Guifeng, HAN Xuesong. Study on the Impacts of Blending Lignite in Bituminous Coal Boiler on Unit Security and Economy [J]. Electric Power, 2018, 51(9): 46-52.
[15]	LEI Jianqi. Flow Field Optimization on the Catalyst Layer Breakage Failure of the SCR-DeNO_x System for a Coal-fired Power Plant [J]. Electric Power, 2018, 51(7): 152-156,169.